Valve positioner with pressure feedback, dynamic correction...

Details Valve positioner with pressure feedback, dynamic correction... Valve positioner with pressure feedback, dynamic correction...

G - Physics

05

D

G05D 16/00 (2006.01) G05D 7/00 (2006.01) G05D 16/20 (2006.01)

Patent

CA 2166867

In this invention, a valve positioner (50) receives a setpoint from a master (62) and provides a control pressure to a valve actuator (70) for controlling a valve (72). A sensing circuit (102) in the positioner (50) senses the position of the valve (72) and the control pressure, and a control circuit (94) in the positioner (50) uses both the sensed pressure and position to provide a command output to a pneumatic section (100) which produces the control pressure.

Dans cette invention un positionneur (50) de vanne reçoit une valeur de référence d'une unité pilote (62) et transmet une pression de commande à un actuateur (70) de vanne destinée à commander une vanne (72). Un circuit (102) de détection se trouvant dans le positionneur (50) détecte la position de la vanne (72) ainsi que la pression de commande, et un circuit de commande (94) se trouvant dans le positionneur (50) utilise à la fois la pression et la position détectée afin de transmettre une instruction à une partie pneumatique (100) produisant la pression de commande.

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